On Tue, Aug 9, 2011 at 11:40 AM, Yu, Fenghua <fenghua.yu@xxxxxxxxx> wrote: >> -----Original Message----- >> From: Andy Lutomirski [mailto:luto@xxxxxxx] >> Sent: Tuesday, August 09, 2011 5:41 AM >> To: x86@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx >> Cc: Yu, Fenghua; Matthew Garrett; Len Brown; linux- >> acpi@xxxxxxxxxxxxxxx; Ingo Molnar; Andy Lutomirski >> Subject: [PATCH v3 1/2] x86: Enable fast strings on Intel if BIOS >> hasn't already >> >> Intel SDM volume 3A, 8.4.2 says: >> >> Software can disable fast-string operation by clearing the >> fast-string-enable bit (bit 0) of IA32_MISC_ENABLE MSR. >> However, Intel recomments that system software always enable >> fast-string operation. >> >> The Intel DQ67SW board (with latest BIOS) disables fast string >> operations if TXT is enabled. A Lenovo X220 disables it regardless >> of TXT setting. I doubt I'm the only person with a dumb BIOS like >> this. >> >> Signed-off-by: Andy Lutomirski <luto@xxxxxxx> >> --- >> arch/x86/kernel/cpu/intel.c | 28 +++++++++++++++++++++++----- >> 1 files changed, 23 insertions(+), 5 deletions(-) > > Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx> > > Please don't apply. This patch breaks !CONFIG_SMP. I'll send a fixed patch later on. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
